linux-kernel - [PATCH 26/76] serial: also set the uartclk value in resume after goes to highspeed

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Date:	Wed, 16 Mar 2011 14:11:56 -0700
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-serial@...r.kernel.org
Cc:	Yin Kangkai <kangkai.yin@...ux.intel.com>,
	Greg Kroah-Hartman <greg@...ah.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 26/76] serial: also set the uartclk value in resume after goes to highspeed

From: Yin Kangkai <kangkai.yin@...ux.intel.com>

For any reason if the NS16550A was not work in high speed mode (e.g. we hold
NS16550A from going to high speed mode in autoconfig_16550a()), now we are
resume from suspend, we should also set the uartclk to the correct
value. Otherwise it is still the old 1843200 and that will bring issues.

CC: Greg Kroah-Hartman <greg@...ah.com>
CC: David Woodhouse <dwmw2@...radead.org>
CC: linux-kernel@...r.kernel.org
CC: stable@...nel.org
Signed-off-by: Yin Kangkai <kangkai.yin@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/tty/serial/8250.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 3975df6..c10a6a9 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -3036,6 +3036,7 @@ void serial8250_resume_port(int line)
 		serial_outp(up, 0x04, tmp);
 
 		serial_outp(up, UART_LCR, 0);
+		up->port.uartclk = 921600*16;
 	}
 	uart_resume_port(&serial8250_reg, &up->port);
 }
-- 
1.7.4.1

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